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Melamine formaldehyde/polyvinyl alcohol composite fiber: Structures and properties controlled by reaction‐induced phase separation
Author(s) -
Xu Weixing,
Yu Cihang,
Zhao Xiangsen,
Xu Jianjun,
Jiang Mengjin
Publication year - 2016
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42918
Subject(s) - polyvinyl alcohol , composite number , formaldehyde , materials science , melamine , fiber , composite material , synthetic fiber , phase (matter) , polymer chemistry , chemistry , organic chemistry
Melamine−formaldehyde resin (MF)/polyvinyl alcohol (PVA) composite fibers with different phase structures and properties were prepared through reaction induced phase separation by wet spinning. Raman spectroscopy, rotary viscometer, and miscibility index were used to characterize the MF resins with different reaction degrees (RD). The phase structures of composite spinning dopes and composite fibers were observed by optical microscope (OM) and scanning electron microscope (SEM). Mechanical properties, flame retardant properties, and thermal stability of the composite fibers were also tested. Results show that the composite fibers made from MF resins with different RD have different phase structures and properties; when the miscibility index (MI) of MF resin is 1.60, the obtained MF/PVA composite fiber shows a sea‐island phase structure, which endues the fiber with the best comprehensive properties: the breaking strength, breaking elongation, rupture work and limiting oxygen index (LOI) are 4.29 cN/dtex, 13.55%, 8.46 × 10 −5 J/dtex and 43.1%, respectively. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 42918.